One of my Newsletter subscribers asked me about the best way to save gasoline using the comfort control system on her car.
Keeping the windows closed does help the car be more aerodynamic. That reduces the wind drag and saves gas, BUT only at highway speeds.
If you are driving around at 40 MPH or slower roll the windows down if you want, it will not cost a measurable amount of gas. On nice days, driving to and from work, I roll mine down and open the moon roof. At anything faster than 40, you start paying a fuel penalty that exceeds the energy used by the comfort control system. The top speed limit for my short commute is 35 MPH.
Regarding how to set your comfort control, remember all the energy that your car uses comes from the fuel in the tank.
At home, the farther the thermostat is set below the outdoor temperature, the harder your home air conditioner has to work. It is like that for the air conditioner in your car too.
In hot weather when it is 90 outdoors, setting the car comfort control at 70 will use more energy than setting it at 74. Using more energy means paying for more fuel.
Yes, shutting the comfort control system off will save gas, but it will increase your stress level too. Not a good thing while doing something as dangerous as driving.
It is a different story when it is cold outdoors. If it is 40 outside and your car comfort control is set to keep you at 72, it uses heat from the engine that would otherwise be thrown away. You don’t burn extra fuel for the energy to heat your car.
There is an exception to every rule. Some cars with air-cooled engines have a fuel burner for heat like the old VW Beetles. Also, Hybrid vehicles generally use an electric pump in addition to an electric fan to move waste heat into the passenger compartment.
If you switch the heater fan to high speed, you use fuel to make the extra electricity to make the fan run faster.
If it is hot outside keep the windows and moon roof closed and use the air conditioning as little as possible to keep comfortable. Do not use the Max Cool setting. Keep the fan at slow speed. The slower you run the fan the less gas you use. The higher you set the temperature the less fuel the air conditioner will use.
If it is cold outside, set the temperature anywhere you want it. Keep the fan at slow speed.
If it is nice outside slow down below 40 MPH, open the windows, shut the comfort control off. Smile as you enjoy the day.
Click this link for a SPECIAL REPORT: HOW TO SAVE MONEY ON AIR CONDITIONING
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